- Definitions|0
- Thesaurus|272
- Abbreviations|0
| nucleus(cause, source, derivation) | |
| occasion(cause, source, derivation) | |
| origins | |
| parent(cause, source, derivation) | |
| parentage(cause, source, derivation) | |
| principle(cause, source, derivation) | |
| producer(cause, source, derivation) | |
| progenitor(cause, source, derivation) | |
| provenance(cause, source, derivation) | |
| provenience(cause, source, derivation) | |
| roots(cause, source, derivation) | |
| seed(cause, source, derivation) | |
| stock(cause, source, derivation) | |
| well(cause, source, derivation) | |
| well-spring | |
| wellspring(cause, source, origin, derivation, birth) |
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| APA | Smart Define. (2015). day one thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/day_one/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "day one thesaurus" https://smartdefine.org/day_one/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, day one thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/day_one/thesaurus/synonyms>. |
| MLA | Smart Define. "day one thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/day_one/thesaurus/synonyms> |